javac no source files found

Question

I have the .java file on the current working directory but javac reports:

javac: no source files
Usage: javac <options> <source files>
use -help for a list of possible options

I'm working on ubuntu.

Answer 1

From your comment above, it looks like you tried:

javac -cp .;lib.jar a.java on your Ubuntu system. The CLASSPATH separator is : on Unix systems and ; on Windows.

Ubuntu considered the command up to the ;, java -cp . and thus gave the message.

javac -cp .:lib.jar a.java should compile fine.